Apparatus for coating articles with pulverulent material.



A c. DOERING, JE. APPARATUS. FOB. GOAT ING ARTICLES WITH PULVBRULENT' MATERIAL.

'APPLICATION FILED JAN. 7, 1911. v 11,068,864. Patented my 2,9, 1913.

Wr! @j o. DOBRING, JR. Y GOATING ARTICLES WITH PULVBRULENT MATERIAL.

APPARATUS FoP.

APPLICATION FILED JAN. 7, 1911. patented July 29, 19135.

C. DOERING, JR. APPARATUS POP. COMING-ARTICLES WITH PULVBRULENT MATERIAL. APPLICATIONl FILED JAN. 7, 1911.

,0|68,864. Patented July 29, 1913 4 SEEETSSHEET 4.

man sTAES-ATENT onirica.

CHARLES nonnrndan., on cHroAGo, ILLINOIs-ASSIGNOR romans a Emme; ce., or

cHICAGo, rumors, a conronnrmn or- Immers.

' Arrana'rus rencontre ARTICLES wITHrULvEnULENT Hernani..

To all whom it may concern j Be it known that I, CHARLES Donnino, Jr., citizen of the United States, 'residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and usevful Improvements in Apparatus for Coating.

. vide a simple and eliicient apparatus of this character, and vconsists in-the features of construction and combinations of parts hereinafter fully described and claimed. f

In the accompanying drawings illustrating the invention: Figure 1fisa view in side elevation-.of a machine constructedin accordance wit-h my invention. Fig -2-.-

is a fragmentary end .elevation of the same.

Fig. -3- is a horizontal section of the same on the line 8 -8 lolf' Fig. 'M4- Fig.V '.-4-- is a central vertical longitudinal section of the same ontlie line t-4 of Fig. Fig. -51- is a vertical transverse section of the' same on the line 5-5 of Fig. -.-1#-. Fig. 6- isa fragmentary vsecltional view of one .of the doors showingv themanner in which the receptacle is se'- cured Ato the same'.

Mypresent invention relates particularly to improvements in machines of this class commonly Aknown as .-bronzing4 machines, shown and described in Let-ters Patent No. 97.6443" issued November 22, 191). First: To provide means whereby the air current by means of which'the pulverulent materialis conveyed and applied to the article may be frever'sed in direction., Second: 'To provide means disposedin the path of the air currents for' deflecting part of the same where-l byy a more or less irregular direction of motion of the air currents is produced. Third:

'To provide means for producinga very strong liow of air. along the floor of the coating chamber so as to pick up `romthe latter all particles of the pulverulent material which may be deposited there. In shape and general appearance the -presentmachine is substantially. identical Specification of 4Letters Patent. f l

Patented Juiyee, 191e.'

Application and .raming 7,1911. serial 116,601,408.

to, be rendered continuous with rails disposed ezgternall'y thereof, this being'accomplished in any suitable manner.'` flbove the coatlng chamber 1 isa hood2 open at its lower end. In said hood there are disposedl tvL-o :fansV 3 and 4 respectively, mounted upon vertical shafts v5 and @"respectively,

which are lsuitably journaled in bearings -1 supported upon the cross-bars 7 in the lower lend portion of the hood 2 and in bearings 8 -mounted -in the upper wall' of said lmod.

Each of said shafts 5 and 6 respectively, is geared by means-'of a belt 9 to pulleys 10 and 11 respectively, disposed on a countershaft 12 at some distance from the machine, said pulleysvbeing'loose 'on said shaft and each being adapted to be clutched to rotate 'therewith bymeans of the clutch member'l actuated by a lever 14 and-engaging clutch members disposed rigid with said respective pulleys. Thesaid shafts 5 and 6 are geared;l

to rotatein the same direction so thatleaclr of said fans serves to project a current of air@ downwardly upon the bottom of the coating chamber.v

Uponftheinner face of the 4,doors 15 of the coating 'chamber thereisA mounted al U- vshaped member 16 coacting with the inner face of the d oor to form a narrow rectangular flue through which air is adapted to pass, the lower end of each of said tiues being disposed relativ'ely near to the floor so as to cause .thea-ir currents delivered from said iues to impinge upon 'and follow the said floor of the coating chamber 1 to pr'event any of the pulverulent'material carried by the air currents from becoming de'- posit-ed upon -said Hoor, and further to remove -therefrom any coating material which may have become deposited upon the same. The air current projected by. said respective ioo fans is adapted to pass downwardly to .im-

.of said hood back to the fan. Owing to the lreceptacle 17 1s distaste of luid currents from turning i sharply the air is given. a relatively rotary l is equipped with a crank armr28-extendingl l ,link29is received., The said lever is adapte the varticles sired, said passing through the door U-shaped member and provided upon itsV receptacles 2Gv removably 4 a link 2.9 so

opened and machine in inner end with a spiral projection 19 adapted to engage thelower portion of saidreceptacle 17 to turn the same into its closed position, this construction being fully illustrated in Fig. 6 and described in the aforesaid patent. e v Y As shown in Fig. *3* detiectin devices 2,0 and 21 are disposed in thepat of the air currents delivered from the respective fans ,-each of said deflectors consisting of aI A U'-shaped member secured at one end to one of said cross-bars 7' and at its other en d to the inner face ot' the nearest adjacent w-all of the hood 2, the middle portion of each of said members being disposed angularly relatively tothe direction of travel of the air current whereby' the air impinging upon the same i' given a slight helical movement which serves to promote uniform distribul tion of the coating material upon'the surfaces to be coated. rI'he number and relative disposition of said deflectors may be increased and diminished as'desired to most etectually produce the desired result.

Mounted upon the hood and communicating therewith through openings 22 .are dust collectors -23 of any suitable construction,

each of kthe latter beingl provided with fabric 'covered outlet 24 for air at which coating material is filtered therefrom, the latter being delivered through pipes 25 into mounted upon the lower ends of said pipes. The openings 22 are controlled by dampers 27 each of which through one of the side walls of the dust ;collector, thev free ends of said arms 28 be-.

ing connectedwith \each other by means of as to move sald dampers 27 1n unison. The said link 29 is adapted to be actuatedbv means of a lever 30 pivotally mounted between its ends uponA the casing of the machine and provided in its upper end with a longitudinal slot,31 in which a pin- 32 disposed between the ends of said ed to be 'engageddn recesses 33 and 34 respectively, in a member 35 mounted upon the outer wall of the coating chamber und by meansof which said lever 'SEO held at either limit of its movement to' maintain the said` dampers 27 openedl or closed as desired. The said lever is adapted'td be sprung into said recesses33 and 34 respectively, in ay wellknown manner.

The operation of the machine is as follows: The truck carrying the articles to be coated, and which is indicated in dotted lines in Fig. -4--,' having been introduced into the coating chamber, the' doors of the latter are closed. -lhe receptacle il? will have been previously supplied with the coating material and after introduction ot' said. truck with its load one ot' the fans is set in motion by means of the clutch member 13 in an obvious manner. rEhe rotation of said fan causes an air current to be produced which passes downwardly toward the door of the machine thence longitudinally of the coating chamber upwardly past the other 4fan and again longitudinally, a relatively ro` tary motion being thus imparted to said air current, and by means ofthe deleetors 2O and 21 being rendered somewhat irregular, The air current picks coating material t'rom the receptacle 17 in travel and, owing to its very rapid motion, holds the same'in suspension, thereby causing it to be conveyed' and applied to the surfaces to be coated. The dampers 27 are maintained closed at this time so that all of the 'coating material is maintained in suspension in the air contained within the coating chamber and maintained in motion by the then operating fan.

After one of said fans has been` maintained in motion for some time the position et' tht` clutch member is reversed so as to release the pulley first clutched rigid with the countershaft and to clutch the other pulley rigid therewith thereby .setting the` second fan in motion. lThe latter produces a relatively rotating air current traveling inthe opposite direction'from that produced by the tiretmentioned fan. Both said 'fans are'alter-V nately set in motion at as many different intervals of as long duration each as may be deemed requisite by the operator to pro duce the desired result, and, thereafter, when it is desired to clarify the coating chamber of coating material the receptacle or receptacles 17 are closedl and thedampers; 27 are" opened whereupon some of the airfcontained within the chamber passes into said dust- 'collectors and is discharged throughthe fab-V ric covered opening 24 thereby 'separating the coating material therefrom andr causing the same to be'collected in the receptacles 26. The air discharged through one ot' said openings 24 is replaced by air entering theother thereof and by reversing the motion of theair during the interval in which the coat-ing chamber isbeing clarih'edthe lnduction and eduction of air is reversed as is also ing material. After the chamberhas been the point of collection of the suspended coatclaritied of coating material and the fans stopped, the doors are opened and the truck containing the coated1 articles removed. A'

" particles also serve, by lrepeated' contact with the coatedsurac'e, to burnish the latter so that when the ,coated article is removed it Abears'a relatively high polisln The above described means for 'clarifying ther coating chamber of ,coating material pleted,- forms no part of my present inven-v tion, the same being- ;f 'claimed in the aforesaid patent.

after the coating operation has been 'comfully described and In a pending application `Serial Number 594796 filed Novembery 29, 1910, I have describedand claimed apparatus for coating articles with pulverulent material'in which the direction of travel ofthe air currents is 4 reversible by means of dampers butin that constructionrthe fan is disposed externally oi" the coating chamber or chambers and delivers into and withdraws from the latter through connecting tlues.

A The present construction affords the advantage of occupying less-space, affording less friction, and promoting motion of allof the air contained Within the chamber so that there is no dead space in which coating material may collect during the coating operation'.

I claim as my invention tv y l. In an apparatus of the kind specified, a coating'chamber adapted to receive the articles to be coated, a coating material supply, means disposed Within said chamber for setting the contained air in motion in respectively opposite directions, and devices controlling said means for determining the direction of travel of, the air currents.

2. In an apparatus of the kind specified, a coating chamber adapted to receive the articles to be coated, a coating` material supply means disposed within said chamber to setting the contained airin motion 1n respectively opposite directions, and devices manually operable from the exteriorbof the coatiugchamber controlling said means for detei-mining the direction of travel of the air currents. y .l

3. In 'anapparatus 'of the kind specified, aclosd coating'V chamber adapted to receive articles to ber coated, two fans adapted to impart movement to the air insaid chamber in respectively opposite directions, means controlling said fans whereby only-one at a time thereof may be set in motion, and l'means for introducing .coating material into said air currents. l

4. In an apparatus of the kind specified, a closed coating chamber adapted to receive articles to be coa-ted, two fans adapted to impart movement to the air in said chamber in respectively. opposite directions, means time thereof may be set in motion, tlues disposed at either end of said coating chamber through which a part said respective fans is adaptedto pass, said flues discharging adjacent the Hoor of the coating chamber and adapted to promote .travelot air the entire length of and along the floor of the coating chamber, and means for `introducing coating material into the said air currents.

' In testimony whereof I- have signed my name in lpresence of two subscribing Witnesses. i, l

.CHARLES DOERING, JR.

Witnesses:

M. M. BOYLE, JACOB M.'WELLES.

controlling said fans whereby only one at a ot the air projected b v 

